The invention mainly relates to the technical field of food processing and discloses a preparation method of candied pericarpium trichosanthi, comprising the following steps: selecting, enzymolysis, drying, tumbling, sugaring, freeze drying and packaging. According to the preparation method for the candied pericarpium trichosanthi, the method is simple and convenient for batch preparation, the obtained candied pericarpium trichosanthi has light yellow color, sweet and sour taste and soft chewiness, the deep processing methods of the pericarpium trichosanthi are increased, and the economic income is increased by 13.7%. Choosing the unripe fructus trichosanthis to prepare candied fruits can increase the thickness of the pericarpium trichosanthi and reduce the nutrient consumption of the fructus trichosanthis, is conducive to the growth of the remaining fructus trichosanthis, makes the fructus trichosanthis grow big and plump and improves the quality of the fructus trichosanthis. Enzymolysis of the pericarpium trichosanthi can destroy macromolecular structure of the pericarpium trichosanthi, increase the softness and tenderness, protect the gastrointestinal function and facilitate the digestion and absorption. Drying the pericarpium trichosanthi after the enzymolysis facilitates the absorption of sugaring liquid, comprising the following steps: high temperature drying first which can reduce water content rapidly and improve efficiency, and drying at intermediate temperature which avoids the cracks caused by rapid loss of water, and then drying at low temperature which keeps the softness and tenderness of the pericarpium trichosanthi.